Portal:Australia/Anniversaries/May/May 3
- 1804 – In the Australian frontier wars, Aborigines attack the newly-established settlement at Risdon Cove, in what is now Tasmania.
- 1820 – John Joseph Therry and Philip Conolly, the first appointed Roman Catholic priests in Australia, arrive in Sydney, New South Wales.
- 1840 – New Zealand is officially proclaimed a separate colony from New South Wales.
- 1970 – Queen Elizabeth II opens a new international passenger terminal at Sydney Airport (pictured), in Mascot, New South Wales.
- 2010 – Merv McIntosh, a three-time winner of the Sandover Medal as the best player in the West Australian Football League (WAFL), dies in Perth, Western Australia, at the age of 87.